Damper regulator



F Y LA. BACKLUND DAMPER REGULATOR Filed April 13 1926' 2 Sheets-Sheet l. 09', ,Bmzwd.

' 1927' i. A. BACKLUND DAMPER REGULATOR 2 Sheets-Sheet 2 Q Filed April 1.3, 1926 fla /12am Patented Feb. '15, 1927.

1,618,044 e r a! FEE.

IsAAo araonnnnn, or SATRA, swnnnn.

DAMPER REGULATOR. 7

Application filed April 13', 1926. Serial No; 101,839.

This invention relates to regulators for the fine dampers of steam boiler furnaces of thattype adapted to be controlled by the pressure in'the boiler and adapted'to move 7 for the pu'rpose of controlling a plurality of en'gines. V

With the foregoing andother objects in view, "the invention consists of the novel construction, combination :and arrangement of parts hereinafter fully described and 'claimedand illsutrated in the accompanying:

drawings, wherein-z i 1 I I Figure-rise sectional View taken ona lane extending vertically through a damper regulator embodying my invention, and Figure 2 is a similar View of a slightly modified form of the'invention.

In the drawing, 1 designates the discharge 7 flue of a steam boiler'furnace, 2: a damper mounted in the flu e 1 for movement about a horizontal axis by means of a. shaft 3, and 4 a lever connected at one end to an end of the shaft3, I a I tic'ally disposed engine 5 which consists of ac'ylinderfi, piston 7 and rod 8. The upper: end of the rod 8 is connected'to, the outer endof the lever by a link -9. .A vertical frame 10 passing about the-cylinder 6 and secured at its upper end to thero'd 8, is pro- The present invention embodies a vervided at its lower end with weights ll which function to normally maintain'the"damper,

2 in its fully opened position and the piston;

7 in its lowermost position The cylinder 6 is provided at a'point below the lowermost position ofthe piston 7 with an inlet and discharge port 11.. A vertically disposed valve 12 controls the admission of fluid pressure to and its discharge from the engine 5,- and consists. of a' cylinder 13,- relativelyspaced pistons '14:, and a-rod15 to which the pistons ltare-oonnectedl' The cylinder 13.; is provided with an intake port 16 and a discharge port 17, and a pipe 18 establishes communication between the cylinder 13 and the port 11 of the engine 5. A pipe 191commnnicates withtheintake port 16and with apipe 2 20 extending from any suitable source of supply of pressure fluid. A pipe 3 21 extends from the; discharge port 17 to a pipe 22 discharging in asewer, reservoir or trap. The pistons 14 of the valve 12 are under the control of 'avertically disposeden-- gine 23whic'h consists of a cylinder 24, .pis 1 ton 25 and rod 26. A, lever 27 pivoted at one end as at 28, has its free end loosely connected to the rod 26 as shown at 29, and the rodl5ris connected as "at 30 to the lever 17 at a pointbetweenthe ends of the latter.

A frame 31 extending vertically about the cylinder 24 isconnected at its upper end 'totherod 26 andcarries at its lowerend weights 32 which function-1 to normally Thecylinder 24 is provided at a point 'be low; the lowermost position of the piston 25 with anwintake and discha'rgee port 33.

maintain the piston 25 in its lowermost position and pistons 14in the positionshown.

The admission of pressure fluid toand'itsr discharge from the engine23 is under the con-trol of ,a valve 34 which is similar to.

f the valve 12 and'consists of a'cylinder 35,

which the pistons are secured This cyla discharge port 39, and communicationibetween it and; the port 33 of theengin'e 23 is established by means ofa'pipe 40. A pipe i 11 communicates with the discharge port- 39 and discharge-pipe 2 2,and a1pipe42communicates withthe intake'port38 and pressure jflu-idsupply'pipe 20. The pipes 19-and :spe'ctively. A lever 45fpivoted at one end as at- 456 is' connected between its ends as at 4:7 tothe rod-37, and carried by the lever adjacent its free end are weights 48 which function to normally hold the pistons 36' in inga casing 50, a diaphragm 51; and arod 52connected to the diaphragm 51 and lever 45," function -,to rock the leveri upwardly "when. the pressure of the steam is great enough'cto overcome the weights 48. This SPELCBmOf'thG boiler by way'of a pipe '53. A

vertically" disposed engine54 controls a.

weight 55 and is under thedi-rect control of the valve 12." It' comprises a cylinder 56-, piston; 57 and rod 58; Acable5 9 secured atoneend to the rod 58 passesover a pulley 60- and has secured to the other end thereof a frame '61. through which thefree end of the the position shown. An engine 49 compris' engine-is in communicationwith the steam relatively spaced pistons'36 and a rod 37 to inder is provided with an intake port 38. and 1 42 are provided-with-valves=43 and 14, re-

lever 45 passes and to which the weight 55 is secured. A frame 62 extends about the engine 54 and is secured to the rod 58. WVeights 63 are. secured to the lower end of the frame 62 and function to normally maintain the piston 57 in its lowermost position. The cylinder 56 is provided at a point below the lowermost position of the piston 57 with an intake and exhaust port64 which is in communication with thepipe' 18 by way of a pipe 65. This pipe is provided with a valve 66. To permit of damper regulators, consisting merelyof-engines similar to the engine 5', to be controlled by this apparatus,

a pipe 67 is provided. This pipe is in communication with the pipe 18 and is provided I with a valve 68.

In practice, the parts of the device normally occupy the positions shown in the drawing and the valves 43, 44 and 66 are opened. The engines 5 and 54 are in communication with the discharge pipe 22 by way of the pipes 18, 65, exhaust port17 of valve 12 and pipe 21, and the engine 23 is in communication with said discharge pipe by way ofthe pipe 40, exhaust port 39 of valve 34 and pipe 41. Whenthe steam pressure is suflicient to overcome the weights 48, the engine 49 .will function to raise the pistons 36 of the valve 34 with the result that communication between the pipes 40 and" 41 will be cut off and communication between the pipes 40 and 42 established. Pressure fluid will now flow by way of the pipes 20 and 42, valve 34 and pipe 40 to the engine 23. The resulting movement of the piston 25 will operate the pistons 14 of the valve 12 in a mannerto cut off communication between the pipes 18 and 65 and the pipe 21, and establish communication between the pipes 18 and 65 and the pipe'19.

Pressure fluid will now flow through the pipes 20 and 19 to the valve 12 andfrom the valve 12 to the engines 5 and 54 by way *ment of the piston 7 of the engine 5 and the of the pipes 18 and 65. The resulting movepiston .57 of the engine '54 will move the damper 2 in the direction of its closed position and lower the frame 61 and weight 55; The degree of movement of the damper 2 in this direction will depend solely on the pressure ofthe steam, This operation of the piston 57 increases the weight on the lever 45 due to the fact that the frame 61 is lowered into contact with the lever, with the result that when the pressure of the steam falls the lever'45 will be" promptly moved intonormal position. The movement of this lever into this position will operate the pistons 36 of the valve 34 in the reverse direction, establishing communication. between the engine 23 and discharge pipe 22' by way of the pipe 40, valve 34and pipe 41. The weights 32 will now operate the valve 12, and as the result establish communication between the engines 5 and 54 and the discharge pipe v22 by way of the pipes 18 and 65, valve 12 and pipe 21. The weight 11 will now move the damper 2 in the directionofits closed position and the weight 63 will move the weight 55 in the direction of its normal position in which latter position the frame 61 is out of contact with the lever 45.

The regulator shown in Figure 2 differs but slightly from the one shown in Figure 1, and corresponding parts of both regulators are designated by similar reference charters. The regulator shown in Figure 2 is simpler than the one shown in Figure 1, and this simplicity in construction was brought about by substituting a combined valve and engine 12 forv the valve 12, engine 23 and connection 27 between the valve 12 and tons are secured. A frame 31v is secured Y to the piston rod 15 and has securedthereto weights 32 The cylinder 13' is provided with an intake port 16 and a discharge port 17 with which the pipes 19 and 21 communicate. The cylinder 13 is provided below the lowermost piston'l4 with a port 33 with which the pipe 40 communicates, and is connected to the engine 5 by wa of the pipe 18, As the operationof this orm ofthe regulator is substantially'thesame as that of the regulator shown in Figure 1, a further description of this regulator is deemed unnecessary.

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the, construction and of the method of operation will be readily apparent to those skilled inthe art to which 7 the invention appertains. While I have de scribed the principle of operationof the invention, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that con'iprising, in combination with a dampery" an engine for operating the damper, a valve for controlling the admission and discharge of presssure fluid to and from the engine, means for controlling said valve and adapted to be'operated by fluid pressure and a weight,

and a second engine under the control of said valve for normally supporting said weight. I

2. A device of the character set forth, comprising, in combination with a damper, an engine for operating the damper, a valve for controlling the admission and discharge of pressure fluid to and from the engine, means for controlling said valve and adapted to be operated by pressure fluid and a weight, a second engine under the control of the valve,and a Weight under the control of the second engine and adapted when said means is operated by pressure fluid to add weight thereto.

3. A device of the character set forth, comprising, in combination with a damper, an engine for operating the damper, a valve for controlling the admission and discharge of presssure to and from the engine, means for operatingthe valve and adapted to be operated by presssure fluid and a weight and embodying a lever, a second engine under the control of the valve, a member adapted to be moved with respect to the lever by the second engine, anda weight carried by the member, said member being lowered into contact with said lever when said means is operated by fluid pressure and raised out of contact with said lever when said means is for controlling the admission and discharge of pressure fluld to and from the engine, a

second engine for operating the valve, a second valve for controlling the admission and discharge of pressure fluid to the second engine, means for operating the second valve and including a lever and a weight, and an engine under the control of the first valve for normally supporting the weightof the lever. 7 H

In testimony whereof I'aflix my signature.

ISAAC A. BACKLUND. 

